Grove - UART WiFi V2 (ESP8285)

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Grove - UART WiFi V2 (ESP8285),Serial Wifi,ESP8285

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We have released the Grove - W600, which is much more cost-effective and convenient for Arduino user to add the WiFi function.

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We've Released the Grove Selection Guide and hope to help you find the Grove suit you best. 

Grove - UART WiFi V2.0(ESP8285) is a serial transceiver module featuring the ubiquitous ESP8285 IoT SoC. With integrated TCP/IP protocol stack, this module lets your microcontroller interact with WiFi networks with only a few lines of code. Each ESP8266 module comes pre-programmed with an AT command set firmware, meaning you can send simple text commands to control the device. The SoC features integrated WEP, WPA/WPA2, TKIP, AES, and WAPI engines, can act as an access point with DHCP, can join existing WiFi networks and has configurable MAC and IP addresses.

It's the upgrade version of Grove - UAUT WiFi, we changed the ESP8266 into ESP8285, and made some other adjustments to make it more stable and lighter. For more detail about the version change, please refer to our wiki.

ESP8285 can perform either as a standalone application or as the slave to a host MCU. When ESP8285 hosts the application, it promptly boots up from the flash. The integrated high-speed cache helps to increase the system performance and optimize the system memory. Also, ESP8285 can be applied to any micro-controller design as a Wi-Fi adaptor through SPI/SDIO or I2C/UART interfaces.


  • Grove 4-pin connector (RX,TX,VCC,GND)

  • 802.11 b/g/n protocol (2.4GHz)

  • WiFi Direct (P2P), soft-AP

  • Supports three modes: AP, STA and AP+STA coexistence mode

  • Integrated TCP/IP protocol stack

  • LwIP (lightweight IP)

  • Integrated low power 32-bit CPU could be reprogrammed as an application processor

  • Serial UART Interface

  • Multi-queue QoS management

  • Wake up and transmit packets in < 2ms

  • Onboard ceramic antenna

  • Reset switch

  • 32-bit processor

  • On-chip SRAM

  • 1 MB build-in SPI flash

Technical details

Dimensions 40mm x20mm x7mm
Weight G.W 8g
Battery Exclude
Input voltage 3V / 5V
Baud Rate 115200
Chip ESP8285 ESP-07 SoC
AT Firmware esp_iot_sdk_v1.1.0
Interface SDIO 1.1/2.0, SPI, UART
Five power states OFF, DEEP_SLEEP, SLEEP, WAKEUP and ON
Consumption Standby power consumption of < 1.0mW (DTIM=3)
Leakage current Power down leakage current of <10uA
Output +19.5dBm output power in 802.11b mode
Security protocol WPA/WPA2 PSK, and WPS

Part List

Grove - UART WiFi V2 (ESP8285) 1
Grove cable 1


HSCODE 8517709000
USHSCODE 8517700000
UPC 841454120346


The wiki of Grove UART Wifi V2

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Customer Reviews
  1. Could not upload the program to Arduino Uno R3 after plugging in Grove Shield Base
    After plugging the Wifi UART v2 in Grove Shield Base (the UART port), I could not upload the program to Arduino Uno R3. It keeps timing out. I have checked the Device Manager on my PC with Windows 10 and the com port works normally (no conflict).
    When I unplug the wifi module, i can upload programs into Arduino again. Any advices?

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